If there was one lesson learned from the Asian Games held in Doha last December, it was this: the thousand seats allocated to matches of sepak takraw could have been doubledmaybe even tripledand the crowds would have still filled them. Imagine the speed and precision of volleyball cut with the aerial kicks of soccer at its showiestset in the intensely combative, close-quarters environment of an indoor courtand you have some idea why this Southeast Asian sport is so visually addictive. Sepak takraw looks like it was devised to a global broadcaster's order. But it originated in the...